Machine for sharpening knives for plush and velvet cutting



Sept. 26, 1939. w. TRUJI-VIN MACHINE FOR SHARPENING KNIVES FOR PLUSH AND VELVET CUTTING Filed Jan. 29, 1957 .wM/ THUJEN AT TC: ENE Y Patented Sept. 26, 1939 I UNITED STATES PATENT OFFICE MACHINE- FOR. SHARPENING KNIVES FOR PLUSH AND VELVET CUTTING Willy Triijen, Erkelenz-Rhineland, Germany Application January 29, 1937, Serial No. 123,029 In Germany May 18, 1936 1 Claim. (Cl. 51247) The present invention relates to a machine for is in movement, an obliquity corresponding to the the sharpening of knives f r plush and velvet cutposition of the knife to be sharpened. Near the ti top of the cover 71. is a hole in which is placed a I have made applications as follows: in Gersquare piece 2' in which are two holes through 5 many, on May 18, 1936; in Belgium, on October which the arms of the spring 9 pass. Throug l 22, 1936; in France, on October 26, 1936; in Italy, t e d g movement of the qu Piece the on November 3, 1936; in Great Britain, on Depart of the sprin 9 acting on t e J urnal 11 xcember 12, 1936. tends or shortens, thus giving either a slack or The devices known up to the present for sharpstrong tension. In order to preve any Overening this type of knife have the disadvantage running f the gr di wh l, h ear wh l 1', 10, that the sharpening is not perfect, from which it on which is fixed a ratchet k acting on the lever results that the threads, instead of being out, are c is braked by means of a spring Z, the pressure ofte ter of which may be regulated by a screw it. The

The object of the present invention is to avoid pparatus is fiXed to the cutting board of the 1.3 this inconvenience. For this purpose, the grindloom by a square plate 122, slotted on its two faces, 16 ing wheel revolves in an opposite direction in rein order to allow of its adjustment either in a lation to the knife which comes into contact with forward, backward, upward or downward direcit, tion. This ensures the possibility of the appa- In the attached drawing, there is represented, ratus being applied to any system of loom.

20 by way of example, a form of realisation of the The control of the sharpening machine is present invention. placed in a cast metal casing it closed by a cover Fig. l is a vertical longitudinal section of the or lid 0 by means of two screws. The apparatus sharpening machine. begins to function when the knife approaches; Fig. 2 is a plan View showing the operative rethe outside edge of the loom. Owing to the fact;

lation of the grinder to the loom knife. that the rotation is in the opposite direction of 25 Fig. 3 is a section following the line A-B of the grinding wheel in relation to that of the knife, Fig. 1. almost a double sharpening force is obtained. It. Figs. 4 and 5 show a plan and a side view of the is possible to use the thinnest grinding wheels of; control lever of the grinding wheel. 50%; previously it was necessary to use coarse On the loom batten, working with a backward grinding whels; which caused notches on the 3 and forward motion, there is screwed by means edge of the knife and consequently bad cutting of a wood screw, a square, on which is fixed a of the material, and grooves which were formerfiat iron a adjustable longitudinally by means of 1y inevitable in curved grinding wheels, are a slot a. On this fiat iron a there is fitted a presavoided in a definite manner, by these rotating sure roller b. With every stroke of the batten, grinding wheels. 35 this pressure roller b pushes the lever 0 towards The stone may be used on both sides, and the front, the lever being brought back to its lasts at least twenty times longer than those original position by a spring 11. By means of gear previously in use, without showing any unevenwheels i, u and e, the movement of the lever c nesses. The setting of the two edges of the causes the last mentioned gear wheel e, which is grinding wheel which was previously carried out 4 locked on the axle p by means of a ball and socket with a file or on an emery Wheel, is now effected joint, to revolve. on an ordinary small wheel by using diamond The grinding wheel 1 revolving with the journal dust, that is on a lapidary wheel, and takes only in the opposite direction to that of an ordinary a few minutes for the operation.

plush-cutting knife with a cutting edge in the The sharpening machine is adjustable in order 5 form of a semi-circle, is mounted on the axle p. to give the grinding wheel either a small or large The journal 21 pene ra e upwards in a notch of rotation, according to the desired sharpening of a cover or lid h, and is maintained in its perpenthe knife and according to the material to be dicular position by a spring with two arms a, woven, by means of a screw q which regulates that is to y, in e form of a a -p he the stroke of the lever c. A change of grinding 50 Cover lid it y Slope, in r v g for example wheel is therefore no longer necessary except round a pivot s, and is then kept in the desired for the types of weaving requiring a special cutposition by means of a locking nut 8', this being ting, and according to the case, the apparatus for the purpose of giving to the grinding wheel is adjusted for small or large rotation.

in its rest position, another obliquity, or when it I claim: 55

2,174,043 A knife sharpening machine for plush and for an intermittent engagement of the grinding velvet cutting, comprising a circular grinding wheel with a knife, and means operated by a wheel with an edge of conical section supported loom batten for rotating intermittently said by a 100m and mounted on an axle, one end of grinding wheel in timed relationship with the a which being supported by a ball and socket joint, knife and in the direction opposite to the latter. 5

the other end being maintained by elastic means WILLY TRUJEN. 

